# 'type assertion expressions' can only be used in a .ts file.ts(8016) KİBANA PDF EXPORT BUG

**URL:** https://discuss.elastic.co/t/type-assertion-expressions-can-only-be-used-in-a-ts-file-ts-8016-kibana-pdf-export-bug/201544
**Category:** Kibana
**Created:** [September 29, 2019, 7:42pm UTC](https://discuss.elastic.co/t/type-assertion-expressions-can-only-be-used-in-a-ts-file-ts-8016-kibana-pdf-export-bug/201544 "2019-09-29T19:42:42Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![mr\_searchng](https://avatars.discourse-cdn.com/v4/letter/m/d07c76/32.png) [@mr\_searchng](https://discuss.elastic.co/u/mr_searchng)
#### Post date: [September 29, 2019, 7:42pm UTC](https://discuss.elastic.co/t/type-assertion-expressions-can-only-be-used-in-a-ts-file-ts-8016-kibana-pdf-export-bug/201544/1 "2019-09-29T19:42:42Z")

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![image](https://us1.discourse-cdn.com/elastic/original/3X/0/4/04a596af2110f6007198e0a4b9e954e9c7fd8e2e.png)

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### Author: ![jbudz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jbudz/32/45922_2.png) [@jbudz](https://discuss.elastic.co/u/jbudz)
#### Post date: [September 30, 2019, 10:09pm UTC](https://discuss.elastic.co/t/type-assertion-expressions-can-only-be-used-in-a-ts-file-ts-8016-kibana-pdf-export-bug/201544/2 "2019-09-30T22:09:37Z")

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Thanks for reporting - can you share which file this is and which version you have opened? Are you seeing this in a production build?

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### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 28, 2019, 10:09pm UTC](https://discuss.elastic.co/t/type-assertion-expressions-can-only-be-used-in-a-ts-file-ts-8016-kibana-pdf-export-bug/201544/3 "2019-10-28T22:09:39Z")

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